Drill-rotating mechanism.



D. S. WAUGH.

DRILL ROTATING MEGHANISM.

APPLICATION FILED FEB.20,1913.

Patented D60. 16, 1913.

2 SHEETSSHEET 1.

[N VEZV T OR Wag 0. Allm'ney ,Daizz'eZ/Jf flg D. s WAUGH.

DRILL ROTATING MECHANISM.

APPLICATION FILED FEB. 20, 1913.

1,081,351, Patented Dec. 16,1913.

2 SHEETSSHEET 2.

J .J Z A/I/ H i ,2

% Q M I Allvomey UNl lED STATES PATENT QFFICE.

DANIEL S. WAUGH, OF DENVER, OOLORADU, ASSIGNOR, BY M'ESNE ASSIGNMENTS, TO THE DENVER ROCK DRILL MANUFACTURING COMPANY, A CORPORATION OF DELAWARE.

DRILL-ROTATING MECHANISM.

Application filed February 20, 1913.

To all whom it may concern:

Be it known that I, DANIEL S. VVAUGII, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented new and useful Improvements in Drill Rotating Mocha nism, of which the following is aspecification.

The object of the present invention is to provide simple means of an ellective character for effecting the automatic rotation of a drill bit from the piston, said means being very compact in its character, and thus making the drilling apparatus, as a whole, relatively short.

An embodiment of the invention that is at present considered the preferable one, is illustrated in the accompanying drawings, wherein Figure l is a longitudinal sectional view through a portion of a hammer drill, showing the improved rotating mechanism. Figs. 2 and 3 are respectively, cross sectional views on the lines 22 and 3- 3 of Fig. 1. Fig. 4 is a sectional view through the ratchet ring. Fig. 5 is a perspective view of the piston and tappet. Fig. 6 is a similar view of the chuck-rotating ring. Fig. 7 is a detail perspective view of the inner end of the chuck sleeve, and Fig. 8 is a perspective view of the ratchet ring, with a portion thereof broken away.

Similar reference numerals designate corresponding parts in all. the figures of the drawings.

In the embodiment disclosed, a portion of the cylinder member is illustrated, and designated 9. This cylinder member is provided at one end with a casing 10, having a barrel extension ll. Within the said barrel extension is a rotatable chuck comprising a sleeve 12 having at its inner end an outstanding retaining tlange 13 that abuts against the inner end of the barrel 1i, and provided in its outer end. with a chuck bush ing 13, said bushing havmg a drill-bit receiving socket let that is angular in cross section to correspond to the particular cross sectional shape of the drill-bit. Thus, in the present embodiment, a portion of a hexagonal bit 15 is shown. The sleeve 12 has a bore 16 at its inner end that communicates with acounterbore 17, in which the bushing 13 is placed and suitably secured. A. recip Specification of Letters Patent.

Patent-ed Dec. 16, 1913.

Serial No. 749,758.

rocatory tappet 18 is located in the chuck sleeve between the ends thereof, said tappet having its main portion 19 slidably fitted in the bore 16, and having an enlarged head portion 20 operating in the counterbore.

A reciprocatory piston 21 operates in the cylinder member 9, and is driven by fluid under pressure controlled by any suitable means. This piston 21 is provided with a reduced hammer extension 22 that has a bearing in the inner end portion of the casing 10, said hammer extension passing through the casing and slidably operating in the inner end of the chuck sleeve 12 in a position to strike the tappet 1.9. This hammer extension 22 is provided with oppositeiy arranged spiral grooves or ways 24;, and between said grooves or ways is also provided with longitudinal grooves or ways 25.

.lotatably mounted in the casing 10 is a clnick-turning ring 26, which, as shown more particularly in Fig. 6, is provided with rear arcuate extensions 27, provided on their inner sides with feathers or keys 28 that are slidably engaged in the longitudinal guideways 25. The outer face o'l. this ring has notches 29 that receive lugs 30 formed on the inner end of the chuck sleeve 12. It will. thus be evident that the ring 26 constitutes a connection between the piston and the chuck that prevents their relative rotation, or in other words, secures their simnl ta neous rotation.

Surrounding the extensions 27 ot the ring 26 is a ratchet wheel or ring ill provided with peripheral ratchet teeth 32, and having on its interior, inwardly extending spiral keys or feathers 33 that are engaged in. the spiral ways or grooves 2i of the hammer extension oi the piston, the feathers 3?), as shown in Fig. 2, being located between the feathers 28 oil? the ring so. The casing 10 is provided with opposite enlargements B l having sockets 235 for the reception of pivot enlargements Si o'lt' swinging pawls 37 that engage the peripheral teeth 32 oi the ratchet ring to prevent its rotation in one direction. Hollow plugs 38, threaded into the enlargements 34- of the casing, contain slidahle plungers 39 that bear against these pawls 37, and are yieldingly held against the same by springs :10, also located in said plugs.

Briefly described, the operation of the mechanism is as follows: \Vhen the piston moves forwardly, it will give a left hand rotative motion to the ratchet ring, causing it to rotate in a direction to carry one or more teeth past the pawls 37. Upon the backward movement of the piston, however, the said pawls prevent a retrograde rotation of the ratchet ring, and as a consequence, the piston must turn. As it turns, it turns the chuck with it through the medium of the ring 26, and consequently, causes a partial rotation of the drill bit in said chuck. herefore as the piston reciprocates, a step-by-step rotation of the same occurs, and a corresponding step-bystep rotation of the chuck and drill bit takes place.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invent-ion will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion, and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In apparatus of the character described, the combination with a cylinder member and a reciprocatory piston operating therein, of a rotatable toolholding chuck, a rotatable ring detachably interlocked with the front end of the piston and the rear end of the chuck, and means for rotating the piston.

2. In apparatus of the character described, the combination with a cylinder member and a reciprocatory piston operating therein, of a rotatable tool-holding chuck, a rotatable ring detachably interlocked with the front end of the piston and the rear end of the chuck, and means interlocked with the front end of the piston for effecting a step-by-step rotation of said piston.

3. In apparatus of the character described, the combination with a cylinder member and a reciprocatory piston operating therein, of a rotatable chuck, a pair of rotatable rings, one being mounted on the other, one of said rings being connected to the chuck and piston, the other to the piston only, and means for effecting a step-bystep rotation of the latter ring.

4. In apparatus of the character described, the combination with a cylinder member and a reciprocatory piston operat ing therein, of a rotatable chuck, a rotatable ring detachably interlocked with the rear end of the chuck and having extending portions slidably interlocked with the piston,

and a ratchet ring rotatable on said extended portions and slidably interlocked with the piston.

5. In apparatus of the character described, the combination with a cylinder member and a reciprocatory piston operating therein, of a rotatable chuck, a rotatable ring, said ring and chuck being provided, one with sockets and the other with lugs engaged in the sockets, said ring being also provided with spaced extensions slidably interlocked with the piston, and a ratchet ring surrounding the extensions and having portions arranged between the same and slidably interlocked with the piston.

6. In apparatus of the character described, the combination with a cylinder member and a rotatable chuck, of a reciprocatory piston, and means for rotating the chuck, including relatively rotatable rings, one engaged with the chuck and the other with the piston.

7. In apparatus of the character described, the combination with a cylinder member and a rotatable chuck, of a reciprocatory piston, and means for rotating the chuck, including relatively rotatable rings, both slidably engaged with the piston, and one being connected to the chuck.

8. In apparatus of the character described, the combination with a cylinder member and a rotatable chuck, of a reciprocatory piston, and means for rotating the chuck, including relatively rota-table concentric rings, both slidably interlocked with the piston, and one being connected to the chuck.

9. In apparatus of the character described, the combination with a cylinder member and a rotatable chuck mounted thereon, of a reciprocatory piston having a hammer extension that enters the inner end of the chuck, said extension having longitudinal and spiral grooves, a ring interlocked with the longitudinal grooves and with the chuck, a ratchet ring rotatably associated with the first mentioned ring and having feathers engaged. in the spiral grooves, and a dog cooperating with the teeth of the ratchet wheel.

10. In apparatus of the character described, the combination with a cylinder member and a piston operating therein, of a rotatable chuck, and means for effecting a rotation of the chuck from the piston, said means including a pair of relatively rotatable rings, one having portions mounted within the other and both having angularlv disposed parts slidably interlocked with the piston.

11. In apparatus of the character described, the combination with a cylinder member and a piston operating therein, of a rotatable chuck, and means for effecting a rotation of the chuck from the piston, said means including a pair of relatively rotatable rings, one of said rings having inwardly extending feather elements slidably interlocked with the piston, the other ring having feather elements located within the firstinentioned ring between the feather elements thereof and also slidably interlocked with the piston.

12. In apparatus of the character de* scribed, the combination with a cylinder member and a piston operating therein having longitudinal and spiral grooves, of a 1'0- tatable chuck, and means for rotating the chuck from the piston, said means including a pair of relatively rotatable rings, one having portions mounted within the other, said rings: having angularly disposed feather elements respectively engaged in the longitudinal and spiral grooves of the piston.

13. In apparatus of the character described, the combination with a cylinder member and a piston operating therein, of a rotatable chuck, and means for effecting the rotation of the chuck from the piston, said means including a pair of relatively rotatable rings, one of the rings being engaged with the rear end of the chuck and having portions located Within the other ring, said port-ions being provided with feather elements slidably interlocked with the piston, the other ring also having inwardly extending feather portions that are slidably interlocked with the piston.

14. In apparatus of the character described, the combination with a cylinder member and a reciprocatory piston therein, having longitudinal and spiral grooves, of a rotatable chuck, a ring surrounding the pieton and having inwardly extending feather elements slida'bly engaged in one set of grooves, and another ring engaging the rear end of the chuck and having rearwardly extending portions located within the first-- mentioned ring between the feather elements thereof, said portions being also pro vided with inwardly extending feather elements slidably engaged in the other set of grooves of the piston.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

DANIEL S. \VAUGH.

Witnesses:

JAs. R. ELMENDORF, C. E. KAISER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latentn,

Washington, D. 0. 

